However, an independent synthesis of 4 using the general method of Sha2 (2) (Scheme 2) revealed that the Barton-Zard product 3 was not 4, but rather an isomer of 4.
Reference
- 2. Sha, C.-K.; Chuang, K.-S.; Wey, S.-J. Tetrahedron, 1992, 48, 10645.
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| Acknowledgements |